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(No Model.)

v M. LAPERSONNERIE,

FIRE PROOF PARTITION BLOCK. I No. 287,552. Patented Oct. 30, 1883.

mvsutron 77@ J ATTORNEYS.

WITNESSES n PETERS. Pnwmunm npher. Walhi nnnnnn UNITED STATES PATENTOFFICE.

MARTIAL LAPERSONNERIE, OF NEW.YORK, N. Y.

FIRE-PROOF PARTITION-BLOCK;

SPEGIFICATIQNforming part of Letters Patent No. 287,552, dated October30, 1883, Application filed September 4,1883. (No modeL) drawings,forming part of this specification,

in which similar letters of reference indicate corresponding parts inall the figures.

Figure 1 is a plan view of a mold for forming my improved fire-proofpartition-blocks,

some of the rolls being removed. Fig. 2 is a sectional elevation of thesame, taken through the line a: m, Fig. 1. Fig. 3 is a perspective viewof one of the blocks and Fig. 4 is a sectional elevation. of the same,taken on the line yy,Fig.3. a

The object of this invention is to facilitate the manufacture offire-proof partition-blocks.

The invention consists in a mold having a wire or cord netting appliedto its base by means of a piece of canvas, to form depressions in thesurfaceof the partition-blocks molded thereon, so that the mortar orplastering ap plied to the partition formed of said blocks will adherefirmly thereto, as will be hereinafter fully described.

A represents the base of a mold for forming fire-proof partition-blocks.B are the sides, and O are the ends, of the mold, which are hingedto thebase Ain the ordinary manner. The ends 0 areperforated in the usualmanner to receive the rolls D, for forming the apertures through theblocks.

E is a piece of canvas of such a, size and shape as to cover the'base A,so that its edgeswill be clamped to the said base by the lower edges ofthe sides B and endsO when the said sides and ends are turned up into avertical position, as' shown in Fig. 2.

To-the canvas E is secured a netting, F, of I wire, cords, or othersuitable material of such a size of strand and mesh as will leave suit-5 able depressions,-G, in the side of the molded block H to cause themortar or plastering to adhere firmly to the said block; The blocks Hcan be made of any suitable material, and are molded in the ordinarymanner.

By my improvementthe labor of scratchthe molded blocks while thematerial is still soft will be avoided; When the blocks H are molded,the rolls D are withdrawn, the sides and ends B G are turned down, andthe block is lifted off the base A, with the netting F and canvas Eadhering to it, which netting and canvas are then removed by taking holdof consists in, applying a wire or cord netting to the base of themolds, as set forth.

3. Fire-proofpartition-blocks H, made, substantially as herein shown anddescribed, with depressions G molded in their sides, to givea firmsupport to the plastering, as set forth.

MARTIAL LAPERSONNERIE.

Witnesses: I

J AMES '1. GRAHAM, O. SEnewrcK.

ing or otherwise roughening the surface of 1

